Organisers have been assured the annual Crazy Hats walk will go ahead despite ongoing improvement works at Wicksteed Park.
Work is being carried out to restore the lake to its former glory and provide a new network of pathways around it.
Concerns had been raised that the work could have an impact on the walk on March 23, but park bosses have reassured the charity the event will go ahead as planned.
Crazy Hats founder Glennis Hooper said: “The weather’s picking up, the park will be ready and we are ready.
“It’s one day a year to do your little bit to support breast cancer patients in Northamptonshire.”
Charity treasurer Marilyn Clapham knows the impact the charity has made for others, but after recently being diagnosed with breast cancer, she is seeing it for herself while undergoing treatment.
Marilyn said: “If it wasn’t for Crazy Hats, I don’t know where I would be.
“Without the support of the members, the volunteers and the people who come along to the Coffee and Chat mornings on Thursdays, I don’t know how I would have coped.”
Crazy Hats has raised £1.8m since its launch in 2001 to improve breast cancer care at Kettering and Northampton general hospitals.